Coil-support for dynamo-electric machinery.



B. G. LAMME. COIL SUPPORT FOR DYNAMO ELECTRIC MACHINERY.

APPLICATION FILED JUNE 28,1905.

Patented Dec. 8, 1908.

WITNESSES: \QLML. 7% Wm 1..

UYIliTED STihTlh BENJAMIN G. LAMUE, OF PITTSBURG, P YNSYLVANIA, A$J1GNUR TO WESTINGHOlJ'bE ELECTRIC & llANUF \J'lURl;\'G COMPAXY, A CORPORATION O]? I.

F. QYLVAN IA.

COIIrsUEPORT FUR DYNAIVIO-ELECTRXC MACEZINERY.

Specification of Letters Patent.

Za'l ented Dec. 8,

Application filed June 28, 1905. Serial No. 267, lf35.

yond the core slots of such inzichines.

The object of my invention is to provide niesns 'lor the support of coil ends which shall eli'ectually prevent warping or dis placement of the coils under mechanical and electro-msgnetic strains and which shall maintain a high degree of insulation.

Tests have. shown that the portions of armature coils which reject beyond toe core slots may l)e'-=suh]ected to enormous strains which tend to violently distort the coils and inllict serious dnnuige to them in case the armature is short-circuitod. This distortion may he explained the reaction, u on each other, of stray magnetic lields w ich are setup by the excessive short-circuited electric currents in diii'erent sets of armature coils, since the tendency is apparently greatestin machines having comparetively few poles, and in which the ampere turns are concentrated in it small number of groups, such as high speed turho-geneintors.

T he explanation included herein not set forth as necessarily stating the correct reason for the coil distortion, but is 'incrcly intended to present a. reasonable theory lOl what takes place when (oils that are not properly supported are short-circuited.

11 order to meet the shove specified conditions, :l. have devised supports which have such form and arrangement and are so soon hined with the moisture frame, core and winding as to successfully resist all tendency to displacement of said winding, or part thereof, in any direction.

My' invention is illustrated in the recompanying drawings, in which core 1 is supported by an end plate and s ironic 2 and provided with plurality of slots 3 in which the magnetizing winding 4 is placed. The conductors in ezich slot are insulated from each other and are bound together, in the usual manner, to constitute a portion of the magnetizing winding 4.

'lhe windings or stationary, polyphose nrinatures involve some special disposition of the end connections 0 the windings, since the windings of one pl 2 (Z-YO'i ings oi" another phase; inst is, if one p windii'ig is considcrcd as the main wini'hng, the other phase windings may he considered as in'terpolnr windings.

in order to ovoid interference of the end connections, it is usual to hend the coils away from the center of the core and let the end connections follow a. circiunlerentisi path concentric with the core hire and slightly farther from the center than the bottoms of the slots. The coils from the int-eroolsr slots may then he carried out in straight lillCS until the first set are avoided and then take a similar form in 11, plane more distant From the lrnrne. in the ome way, all the windings of dill'eront phases which are included within carried out and bent awa from the center.

llowever, it-is obviously unnecessary to bend down last set so that the end connections often follow s. circuinferentinl path that is concentric with the core face and ol' suhstantielly equal radius.

The winding iustrsted in the aiccoinpe iug drawing has, for e esy pole, two coils :3 and c that are sent aw. W from the core center after leaving the slots and on might coil 7. A coil support comprises s. durality of complete rings 9, 1G and ii, of which ring 9 is made with a radius slighly longer than the radius of circle passing through the bottoms il the core slots 3 so that it may slip over the straight coils 7, the clearanc being taken up by a. series of spacing blocks 1: 3 which are inserted between the cute of the coils and the inner surface oi tl and serve to support that port ion of the winding which is not included in. he slots The rings 10 end 11 are made o- -oilicieut radius to slip over the coils mod 5, leaving c earance spaces for blocks 112 similar to i ll inner body portion 13 having lint, inner poill?) cord ma be passed to bind the coils to the rings. he rings are held in position by- .means of a plurality of similar supporting brackets 16, each of which comprises an arm 17, three grooved pro ections 18 which are properly located to receive the curved or- 7 tions 1 of the rings 9, l0 and 11 and a ase piece 19. the end plate 1* of the core by means of the The brackets 16 are fastened to base piece 19 and bolts 20.

The form and dimensions of the bracket 17 and of the rings 10 may, of course, be varied from what I have shown, and the brackets may be fastened to the frame 2 instead of being bolted to the plate 1 as indicated. It will also be understood that my invention is not limited to generators as distinguished from motors or to the stationary members as distinguished from the rotary members of machines, except in so far as the character-of Winding or the service to be performed imposes such. limitations.

I claim as my invention:

1. A coil su port comprising a ring, a plurality of detacliable supporting brackets hav ing laterally projecting seats to receive the outer side of said ring to prevent both radial and longitudinal movement, and means for fastening the brackets to a rigid body.

2. In a dynamo-electric machine, the combination with a magnetizable core, a supporting frame therefor, and a magnetizing winding partially included in a plurality of slots in said core, of supporting means for the portions of said winding which are not included in said slots, said means com risin a ring, a plurality of brackets having ateraIly projecting seats to receive the outer side of said ring to prevent both radial and longitudinal movement, and means for rigidly connecting the brackets to said frame.

. 3. In a d j namo-electric machine, the combination with a slotted magnetizable core, a supporting frame therefor and a magnetizing Winding partially included in the core slots, oisupporting means for the portions of ceases said winding which are not included in said slots, said means comprising a plurality of rings a plurality of brackets, each of which has seats for said rings, and means for rigidly fastening the brackets to said frame.

4. In a dynamo-electric machine, the combination with a winding, and a core and frame therefor, of a set of rings, a set of supporting brackets each of which has seats for said rings, and sets of blocks interposed be tween the rings and the portions of the wind ing that project beyond the end of the core.

5. In a dynamo-electric machine, the combination with a frame, a slotted core and coils located in the core slots and rojecting beyond their ends, into different p anes, of a set of supporting rings, one for the coil ends in each plane, brackets having seats fonsaid rin s, and blocks fitted between the coil ends an the rings.

6. In a dynamo-electric machine, the combination with a frame, a slotted core and three sets of coils that project from the core slots into three different planes, of a set of supporting rings for said coil ends, a series of brackets having ring supports and sets of blocks that are fitted between the rings and the corresponding coil ends.

7. In an electrical machine, a frame having a slotted core and coils located in and projecting beyond the ends of the core slots, in combination with a set of brackets supported by the frame adjacent to the projecting coilends and a set of supporting rings interposed between the brackets and the coilends.

8. In an electrical machine, a frame having a slotted core and coils located in and projecting beyond the ends of the core slots, in combination with a set of brackets suportedby the frame adjacent to the projectmg coil-ends, a set of sup orting rings resting upon the brackets, an blocks interposed between the rings and the coil-ends.

' In testimony whereof, I have hereunto subscribed my name this 23rd day of June 1905.

BENJ. G. LAMMF). Witnesses ELIZABETH Lrvnvosron, BInNnY HrNEs. 

